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<h1 class="title">dynamicscene.qml 示例文件</h1>
<span class="subtitle">dynamicscene/dynamicscene.qml</span>
<!-- $$$dynamicscene/dynamicscene.qml-description -->
<div class="descr"> <a name="details"></a>
<pre class="qml">

  <span class="comment">/****************************************************************************
  **
  ** Copyright (C) 2017 The Qt Company Ltd.
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of the examples of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:BSD$
  ** Commercial License Usage
  ** Licensees holding valid commercial Qt licenses may use this file in
  ** accordance with the commercial license agreement provided with the
  ** Software or, alternatively, in accordance with the terms contained in
  ** a written agreement between you and The Qt Company. For licensing terms
  ** and conditions see https://www.qt.io/terms-conditions. For further
  ** information use the contact form at https://www.qt.io/contact-us.
  **
  ** BSD License Usage
  ** Alternatively, you may use this file under the terms of the BSD license
  ** as follows:
  **
  ** &quot;Redistribution and use in source and binary forms, with or without
  ** modification, are permitted provided that the following conditions are
  ** met:
  **   * Redistributions of source code must retain the above copyright
  **     notice, this list of conditions and the following disclaimer.
  **   * Redistributions in binary form must reproduce the above copyright
  **     notice, this list of conditions and the following disclaimer in
  **     the documentation and/or other materials provided with the
  **     distribution.
  **   * Neither the name of The Qt Company Ltd nor the names of its
  **     contributors may be used to endorse or promote products derived
  **     from this software without specific prior written permission.
  **
  **
  ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  ** &quot;AS IS&quot; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.&quot;
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/</span>

  import QtQuick 2.0
  import QtQuick.Particles 2.0
  import &quot;content&quot;

  <span class="type"><a href="../qtquick/qml-qtquick-item.html">Item</a></span> {
      <span class="name">id</span>: <span class="name">window</span>

      property <span class="type"><a href="qml-int.html">int</a></span> <span class="name">activeSuns</span>: <span class="number">0</span>
      property <span class="type"><a href="qml-int.html">int</a></span> <span class="name">centerOffset</span>: <span class="number">72</span>

      <span class="name">height</span>: <span class="number">480</span>; <span class="name">width</span>: <span class="number">320</span>

      <span class="type"><a href="../qtquick/qml-qtquick-mousearea.html">MouseArea</a></span> {
          <span class="name">anchors</span>.fill: <span class="name">parent</span>
          <span class="name">onClicked</span>: <span class="name">window</span>.<span class="name">focus</span> <span class="operator">=</span> <span class="number">false</span>;
      }

      <span class="comment">//This is the message box that pops up when there's an error</span>
      <span class="type"><a href="../qtquick/qml-qtquick-rectangle.html">Rectangle</a></span> {
          <span class="name">id</span>: <span class="name">dialog</span>

          <span class="name">opacity</span>: <span class="number">0</span>
          <span class="name">anchors</span>.centerIn: <span class="name">parent</span>
          <span class="name">width</span>: <span class="name">dialogText</span>.<span class="name">width</span> <span class="operator">+</span> <span class="number">6</span>; <span class="name">height</span>: <span class="name">dialogText</span>.<span class="name">height</span> <span class="operator">+</span> <span class="number">6</span>
          <span class="name">border</span>.color: <span class="string">'black'</span>
          <span class="name">color</span>: <span class="string">'lightsteelblue'</span>
          <span class="name">z</span>: <span class="number">65535</span> <span class="comment">//Arbitrary number chosen to be above all the items, including the scaled perspective ones.</span>

          <span class="keyword">function</span> <span class="name">show</span>(str){
              <span class="name">dialogText</span>.<span class="name">text</span> <span class="operator">=</span> <span class="name">str</span>;
              <span class="name">dialogAnim</span>.<span class="name">start</span>();
          }

          <span class="type"><a href="../qtquick/qml-qtquick-text.html">Text</a></span> {
              <span class="name">id</span>: <span class="name">dialogText</span>
              <span class="name">x</span>: <span class="number">3</span>; <span class="name">y</span>: <span class="number">3</span>
              <span class="name">font</span>.pixelSize: <span class="number">14</span>
          }

          <span class="type"><a href="../qtquick/qml-qtquick-sequentialanimation.html">SequentialAnimation</a></span> {
              <span class="name">id</span>: <span class="name">dialogAnim</span>
              <span class="type"><a href="../qtquick/qml-qtquick-numberanimation.html">NumberAnimation</a></span> { <span class="name">target</span>: <span class="name">dialog</span>; <span class="name">property</span>:<span class="string">&quot;opacity&quot;</span>; <span class="name">to</span>: <span class="number">1</span>; <span class="name">duration</span>: <span class="number">1000</span> }
              <span class="type"><a href="../qtquick/qml-qtquick-pauseanimation.html">PauseAnimation</a></span> { <span class="name">duration</span>: <span class="number">5000</span> }
              <span class="type"><a href="../qtquick/qml-qtquick-numberanimation.html">NumberAnimation</a></span> { <span class="name">target</span>: <span class="name">dialog</span>; <span class="name">property</span>:<span class="string">&quot;opacity&quot;</span>; <span class="name">to</span>: <span class="number">0</span>; <span class="name">duration</span>: <span class="number">1000</span> }
          }
      }

      <span class="type"><a href="../qtquick/qml-qtquick-item.html">Item</a></span> {
          <span class="name">id</span>: <span class="name">scene</span>
          <span class="type">anchors</span> { <span class="name">top</span>: <span class="name">sky</span>.<span class="name">top</span>; <span class="name">bottom</span>: <span class="name">ground</span>.<span class="name">bottom</span>; <span class="name">left</span>: <span class="name">parent</span>.<span class="name">left</span>; <span class="name">right</span>: <span class="name">parent</span>.<span class="name">right</span>}
          <span class="name">z</span>: <span class="number">10</span>
      }

     <span class="comment">// sky</span>
      <span class="type"><a href="../qtquick/qml-qtquick-rectangle.html">Rectangle</a></span> {
          <span class="name">id</span>: <span class="name">sky</span>
          <span class="type">anchors</span> { <span class="name">left</span>: <span class="name">parent</span>.<span class="name">left</span>; <span class="name">top</span>: <span class="name">toolbox</span>.<span class="name">bottom</span>; <span class="name">right</span>: <span class="name">parent</span>.<span class="name">right</span>;  <span class="name">bottomMargin</span>: -<span class="name">window</span>.<span class="name">centerOffset</span>; <span class="name">bottom</span>: <span class="name">parent</span>.<span class="name">verticalCenter</span> }
          <span class="name">gradient</span>: <span class="name">Gradient</span> {
              <span class="type"><a href="../qtquick/qml-qtquick-gradientstop.html">GradientStop</a></span> { <span class="name">id</span>: <span class="name">gradientStopA</span>; <span class="name">position</span>: <span class="number">0.0</span>; <span class="name">color</span>: <span class="string">&quot;#0E1533&quot;</span> }
              <span class="type"><a href="../qtquick/qml-qtquick-gradientstop.html">GradientStop</a></span> { <span class="name">id</span>: <span class="name">gradientStopB</span>; <span class="name">position</span>: <span class="number">1.0</span>; <span class="name">color</span>: <span class="string">&quot;#437284&quot;</span> }
          }
      }

      <span class="comment">// stars (when there's no sun)</span>
      <span class="type"><a href="../qtquick/qml-qtquick-particles-particlesystem.html">ParticleSystem</a></span> {
          <span class="name">id</span>: <span class="name">particlesystem</span>
          <span class="name">anchors</span>.fill: <span class="name">sky</span>

          <span class="type"><a href="../qtquick/qml-qtquick-particles-imageparticle.html">ImageParticle</a></span> {
              <span class="name">id</span>: <span class="name">stars</span>
              <span class="name">source</span>: <span class="string">&quot;content/images/star.png&quot;</span>
              <span class="name">groups</span>: [<span class="string">&quot;stars&quot;</span>]
              <span class="name">opacity</span>: <span class="number">.5</span>
          }

          <span class="type"><a href="../qtquick/qml-qtquick-particles-emitter.html">Emitter</a></span> {
              <span class="name">id</span>: <span class="name">starsemitter</span>
              <span class="name">anchors</span>.fill: <span class="name">parent</span>
              <span class="name">emitRate</span>: <span class="name">parent</span>.<span class="name">width</span> <span class="operator">/</span> <span class="number">50</span>
              <span class="name">lifeSpan</span>: <span class="number">5000</span>
              <span class="name">group</span>: <span class="string">&quot;stars&quot;</span>
          }
      }

      <span class="comment">// ground</span>
      <span class="type"><a href="../qtquick/qml-qtquick-rectangle.html">Rectangle</a></span> {
          <span class="name">id</span>: <span class="name">ground</span>
          <span class="name">z</span>: <span class="number">2</span>    <span class="comment">// just above the sun so that the sun can set behind it</span>
          <span class="type">anchors</span> { <span class="name">left</span>: <span class="name">parent</span>.<span class="name">left</span>; <span class="name">top</span>: <span class="name">parent</span>.<span class="name">verticalCenter</span>; <span class="name">topMargin</span>: <span class="name">window</span>.<span class="name">centerOffset</span>; <span class="name">right</span>: <span class="name">parent</span>.<span class="name">right</span>; <span class="name">bottom</span>: <span class="name">parent</span>.<span class="name">bottom</span> }
          <span class="name">gradient</span>: <span class="name">Gradient</span> {
              <span class="type"><a href="../qtquick/qml-qtquick-gradientstop.html">GradientStop</a></span> { <span class="name">position</span>: <span class="number">0.0</span>; <span class="name">color</span>: <span class="string">&quot;ForestGreen&quot;</span> }
              <span class="type"><a href="../qtquick/qml-qtquick-gradientstop.html">GradientStop</a></span> { <span class="name">position</span>: <span class="number">1.0</span>; <span class="name">color</span>: <span class="string">&quot;DarkGreen&quot;</span> }
          }
      }

      <span class="comment">// top panel</span>
      <span class="type"><a href="../qtquick/qml-qtquick-rectangle.html">Rectangle</a></span> {
          <span class="name">id</span>: <span class="name">toolbox</span>

          <span class="name">height</span>: <span class="name">window</span>.<span class="name">centerOffset</span> <span class="operator">*</span> <span class="number">2</span>
          <span class="name">color</span>: <span class="string">&quot;white&quot;</span>
          <span class="type">anchors</span> { <span class="name">right</span>: <span class="name">parent</span>.<span class="name">right</span>; <span class="name">top</span>: <span class="name">parent</span>.<span class="name">top</span>; <span class="name">left</span>: <span class="name">parent</span>.<span class="name">left</span>}

          <span class="type"><a href="../qtquick/qml-qtquick-column.html">Column</a></span> {
              <span class="name">anchors</span>.centerIn: <span class="name">parent</span>
              <span class="name">spacing</span>: <span class="number">8</span>

              <span class="type"><a href="../qtquick/qml-qtquick-text.html">Text</a></span> { <span class="name">text</span>: <span class="string">&quot;Drag an item into the scene.&quot;</span> }

              <span class="type"><a href="../qtquick/qml-qtquick-rectangle.html">Rectangle</a></span> {
                  <span class="name">width</span>: <span class="name">palette</span>.<span class="name">width</span> <span class="operator">+</span> <span class="number">10</span>; <span class="name">height</span>: <span class="name">palette</span>.<span class="name">height</span> <span class="operator">+</span> <span class="number">10</span>
                  <span class="name">border</span>.color: <span class="string">&quot;black&quot;</span>

                  <span class="type"><a href="../qtquick/qml-qtquick-row.html">Row</a></span> {
                      <span class="name">id</span>: <span class="name">palette</span>
                      <span class="name">anchors</span>.centerIn: <span class="name">parent</span>
                      <span class="name">spacing</span>: <span class="number">8</span>

                      <span class="type">PaletteItem</span> {
                          <span class="name">anchors</span>.verticalCenter: <span class="name">parent</span>.<span class="name">verticalCenter</span>
                          <span class="name">componentFile</span>: <span class="string">&quot;Sun.qml&quot;</span>
                          <span class="name">source</span>: <span class="string">&quot;content/images/sun.png&quot;</span>
                          <span class="name">image</span>: <span class="string">&quot;images/sun.png&quot;</span>
                      }
                      <span class="type">PaletteItem</span> {
                          <span class="name">anchors</span>.verticalCenter: <span class="name">parent</span>.<span class="name">verticalCenter</span>
                          <span class="name">componentFile</span>: <span class="string">&quot;GenericSceneItem.qml&quot;</span>
                          <span class="name">source</span>: <span class="string">&quot;content/images/moon.png&quot;</span>
                          <span class="name">image</span>: <span class="string">&quot;images/moon.png&quot;</span>
                      }
                      <span class="type">PaletteItem</span> {
                          <span class="name">anchors</span>.verticalCenter: <span class="name">parent</span>.<span class="name">verticalCenter</span>
                          <span class="name">componentFile</span>: <span class="string">&quot;PerspectiveItem.qml&quot;</span>
                          <span class="name">source</span>: <span class="string">&quot;content/images/tree_s.png&quot;</span>
                          <span class="name">image</span>: <span class="string">&quot;images/tree_s.png&quot;</span>
                      }
                      <span class="type">PaletteItem</span> {
                          <span class="name">anchors</span>.verticalCenter: <span class="name">parent</span>.<span class="name">verticalCenter</span>
                          <span class="name">componentFile</span>: <span class="string">&quot;PerspectiveItem.qml&quot;</span>
                          <span class="name">source</span>: <span class="string">&quot;content/images/rabbit_brown.png&quot;</span>
                          <span class="name">image</span>: <span class="string">&quot;images/rabbit_brown.png&quot;</span>
                      }
                      <span class="type">PaletteItem</span> {
                          <span class="name">anchors</span>.verticalCenter: <span class="name">parent</span>.<span class="name">verticalCenter</span>
                          <span class="name">componentFile</span>: <span class="string">&quot;PerspectiveItem.qml&quot;</span>
                          <span class="name">source</span>: <span class="string">&quot;content/images/rabbit_bw.png&quot;</span>
                          <span class="name">image</span>: <span class="string">&quot;images/rabbit_bw.png&quot;</span>
                      }
                  }
              }

              <span class="type"><a href="../qtquick/qml-qtquick-text.html">Text</a></span> { <span class="name">text</span>: <span class="string">&quot;Active Suns: &quot;</span> <span class="operator">+</span> <span class="name">window</span>.<span class="name">activeSuns</span> }
          }
      }

      <span class="comment">//Popup toolbox down the bottom</span>
      <span class="type"><a href="../qtquick/qml-qtquick-rectangle.html">Rectangle</a></span> {
          <span class="name">id</span>: <span class="name">popupToolbox</span>
          <span class="name">z</span>: <span class="number">1000</span>
          <span class="name">width</span>: <span class="name">parent</span>.<span class="name">width</span>
          <span class="name">height</span>: <span class="name">popupColumn</span>.<span class="name">height</span> <span class="operator">+</span> <span class="number">16</span>
          <span class="name">color</span>: <span class="string">&quot;white&quot;</span>

          property <span class="type"><a href="qml-bool.html">bool</a></span> <span class="name">poppedUp</span>: <span class="number">false</span>
          property <span class="type"><a href="qml-int.html">int</a></span> <span class="name">downY</span>: <span class="name">window</span>.<span class="name">height</span> <span class="operator">-</span> (<span class="name">createButton</span>.<span class="name">height</span> <span class="operator">+</span> <span class="number">16</span>)
          property <span class="type"><a href="qml-int.html">int</a></span> <span class="name">upY</span>: <span class="name">window</span>.<span class="name">height</span> <span class="operator">-</span> (<span class="name">popupColumn</span>.<span class="name">height</span> <span class="operator">+</span> <span class="number">16</span>)
          <span class="name">y</span>: <span class="name">poppedUp</span> ? <span class="name">upY</span> : <span class="name">downY</span>
          Behavior on <span class="name">y</span> { <span class="type"><a href="../qtquick/qml-qtquick-numberanimation.html">NumberAnimation</a></span> {}}

          <span class="type"><a href="../qtquick/qml-qtquick-column.html">Column</a></span> {
              <span class="name">id</span>: <span class="name">popupColumn</span>
              <span class="name">y</span>: <span class="number">8</span>
              <span class="name">spacing</span>: <span class="number">8</span>

              <span class="type"><a href="../qtquick/qml-qtquick-row.html">Row</a></span> {
                  <span class="name">height</span>: <span class="name">createButton</span>.<span class="name">height</span>
                  <span class="name">spacing</span>: <span class="number">8</span>
                  <span class="type"><a href="../qtquick/qml-qtquick-text.html">Text</a></span> { <span class="name">text</span>: <span class="string">&quot;Custom QML:&quot;</span>; <span class="name">anchors</span>.verticalCenter: <span class="name">parent</span>.<span class="name">verticalCenter</span> }
                  <span class="type"><a href="../qtquickcontrols/qml-qtquick-controls2-button.html">Button</a></span> {
                      <span class="name">id</span>: <span class="name">popupButton</span>
                      <span class="name">text</span>: <span class="name">popupToolbox</span>.<span class="name">poppedUp</span> ? <span class="string">&quot;Hide&quot;</span> : <span class="string">&quot;Show&quot;</span>
                      <span class="name">onClicked</span>: <span class="name">popupToolbox</span>.<span class="name">poppedUp</span> <span class="operator">=</span> !<span class="name">popupToolbox</span>.<span class="name">poppedUp</span>
                  }
                  <span class="type"><a href="../qtquickcontrols/qml-qtquick-controls2-button.html">Button</a></span> {
                      <span class="name">id</span>: <span class="name">createButton</span>
                      <span class="name">text</span>: <span class="string">&quot;Create&quot;</span>
                      <span class="name">onClicked</span>: {
                          <span class="keyword">try</span> {
                              <span class="name">Qt</span>.<span class="name">createQmlObject</span>(<span class="name">qmlText</span>.<span class="name">text</span>, <span class="name">scene</span>, <span class="string">'CustomObject'</span>);
                          } <span class="keyword">catch</span>(<span class="name">err</span>) {
                              dialog.show('Error on line ' + err.qmlErrors[0].lineNumber + '\n' + err.qmlErrors[0].message);
                          }
                      }
                  }

              }

              <span class="type"><a href="../qtquick/qml-qtquick-rectangle.html">Rectangle</a></span> {
                  <span class="name">width</span>: <span class="number">360</span>; <span class="name">height</span>: <span class="number">240</span>

                  <span class="type"><a href="../qtquick/qml-qtquick-textedit.html">TextEdit</a></span> {
                      <span class="name">id</span>: <span class="name">qmlText</span>
                      <span class="name">anchors</span>.fill: <span class="name">parent</span>; <span class="name">anchors</span>.margins: <span class="number">5</span>
                      <span class="name">readOnly</span>: <span class="number">false</span>
                      <span class="name">font</span>.pixelSize: <span class="number">14</span>
                      <span class="name">selectByMouse</span>: <span class="number">true</span>
                      <span class="name">wrapMode</span>: <span class="name">TextEdit</span>.<span class="name">WordWrap</span>

                      <span class="name">text</span>: <span class="string">&quot;import QtQuick 2.0\nImage {\n    id: smile\n    x: 360 * Math.random()\n    y: 40 * Math.random() \n    source: 'content/images/face-smile.png'\n    NumberAnimation on opacity { \n        to: 0; duration: 1500\n    }\n    Component.onCompleted: smile.destroy(1500);\n}&quot;</span>
                  }
              }
          }
      }

      <span class="comment">//Day state, for when a sun is added to the scene</span>
      <span class="name">states</span>: <span class="name">State</span> {
          <span class="name">name</span>: <span class="string">&quot;Day&quot;</span>
          <span class="name">when</span>: <span class="name">window</span>.<span class="name">activeSuns</span> <span class="operator">&gt;</span> <span class="number">0</span>

          <span class="type"><a href="../qtquick/qml-qtquick-propertychanges.html">PropertyChanges</a></span> { <span class="name">target</span>: <span class="name">gradientStopA</span>; <span class="name">color</span>: <span class="string">&quot;DeepSkyBlue&quot;</span> }
          <span class="type"><a href="../qtquick/qml-qtquick-propertychanges.html">PropertyChanges</a></span> { <span class="name">target</span>: <span class="name">gradientStopB</span>; <span class="name">color</span>: <span class="string">&quot;SkyBlue&quot;</span> }
          <span class="type"><a href="../qtquick/qml-qtquick-propertychanges.html">PropertyChanges</a></span> { <span class="name">target</span>: <span class="name">stars</span>; <span class="name">opacity</span>: <span class="number">0</span> }
      }

      <span class="name">transitions</span>: <span class="name">Transition</span> {
          <span class="type"><a href="../qtquick/qml-qtquick-propertyanimation.html">PropertyAnimation</a></span> { <span class="name">duration</span>: <span class="number">3000</span> }
          <span class="type"><a href="../qtquick/qml-qtquick-coloranimation.html">ColorAnimation</a></span> { <span class="name">duration</span>: <span class="number">3000</span> }
      }
  }

</pre>
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<!-- @@@dynamicscene/dynamicscene.qml -->
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